# Apache Pinot

[Apache Pinot][link-pinot] is a real-time distributed OLAP datastore purpose-built
for low-latency, high-throughput analytics, and perfect for user-facing analytical
workloads. [StarTree][link-startree] is a fully-managed platform for Pinot.

## Prerequisites

- The hostname for the [Pinot][pinot] broker
- The port for the [Pinot][pinot] broker

Note that the following features should be enabled in your Pinot cluster:
- [Multi-stage query engine][link-pinot-msqe].
- [Advanced null value support][link-pinot-nvs].

## Setup

<ReferenceBox>

Currently, Apache Pinot is not shown in the list of available data sources in the UI.
However, you can still [configure](https://github.com/cube-js/cube/issues/8579#issuecomment-2453545048)
it using environment variables.

</ReferenceBox>

### Manual

Add the following to a `.env` file in your Cube project:

```dotenv
CUBEJS_DB_TYPE=pinot
CUBEJS_DB_HOST=http[s]://pinot.broker.host
CUBEJS_DB_PORT=8099
CUBEJS_DB_USER=pinot_user
CUBEJS_DB_PASS=**********
```

## Environment Variables

| Environment Variable            | Description                                           | Possible Values     | Required |
|---------------------------------|-------------------------------------------------------|---------------------|:--------:|
| `CUBEJS_DB_HOST`                | The host URL for your Pinot broker                    | A valid host URL    |    ✅    |
| `CUBEJS_DB_PORT`                | The port for the database connection                  | A valid port number |    ✅    |
| `CUBEJS_DB_USER`                | The username used to connect to the broker            | A valid username    |    ❌    |
| `CUBEJS_DB_PASS`                | The password used to connect to the broker            | A valid password    |    ❌    |
| `CUBEJS_DB_NAME`                | The database name for StarTree                        | A valid name        |    ❌    |
| `CUBEJS_DB_PINOT_NULL_HANDLING` | If `true`, enables null handling. Default is `false`  | `true`, `false`     |    ❌    |
| `CUBEJS_DB_PINOT_AUTH_TOKEN`    | The authentication token for StarTree                 | A valid token       |    ❌    |
| `CUBEJS_CONCURRENCY` | The number of [concurrent queries][ref-data-source-concurrency] to the data source | A valid number |    ❌    |

[ref-data-source-concurrency]: /product/configuration/concurrency#data-source-concurrency

## Pre-Aggregation Feature Support

### count_distinct_approx

Measures of type
[`count_distinct_approx`][ref-schema-ref-types-formats-countdistinctapprox] can
be used in pre-aggregations when using Pinot as a source database. To learn more
about Pinot support for approximate aggregate functions, [click
here][pinot-docs-approx-agg-fns].

## Pre-aggregation build strategies

<InfoBox>

To learn more about pre-aggregation build strategies, [head
here][ref-caching-using-preaggs-build-strats].

</InfoBox>

| Feature       | Works with read-only mode? | Is default? |
|---------------|:--------------------------:|:-----------:|
| Simple        |             ✅             |      ✅     |
| Batching      |             -              |      -      |
| Export bucket |             -              |      -      |

By default, Pinot uses a simple strategy to build pre-aggregations.

### Simple

No extra configuration is required to configure simple pre-aggregation builds
for Pinot.

### Batching

Pinot does not support batching.

### Export bucket

Pinot does not support export buckets.

## SSL

Cube does not require any additional configuration to enable SSL as Pinot connections are made over HTTPS.

[link-pinot]: https://pinot.apache.org/
[pinot]: https://docs.pinot.apache.org/
[link-pinot-msqe]: https://docs.pinot.apache.org/reference/multi-stage-engine
[link-pinot-nvs]: https://docs.pinot.apache.org/developers/advanced/null-value-support#advanced-null-handling-support
[pinot-docs-approx-agg-fns]:
  https://docs.pinot.apache.org/users/user-guide-query/query-syntax/how-to-handle-unique-counting
[ref-schema-ref-types-formats-countdistinctapprox]: /product/data-modeling/reference/types-and-formats#count_distinct_approx
[link-startree]: https://startree.ai